Given a cyclic quadrilateral $ABCD$ inscribed $(O)$. The internal bisectors of the angles $A,B,C,D$ meet each others to form a quadrilateral $XYZT$. Prove $O$ lies in the Gauss-Newton line of $XYZT$
2026-03-25 07:43:58.1774424638
O lies in the Gauss line
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